1 package org.apache.turbine.util;
2
3 /* ====================================================================
4 * The Apache Software License, Version 1.1
5 *
6 * Copyright (c) 2001 The Apache Software Foundation. All rights
7 * reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. The end-user documentation included with the redistribution,
22 * if any, must include the following acknowledgment:
23 * "This product includes software developed by the
24 * Apache Software Foundation (http://www.apache.org/)."
25 * Alternately, this acknowledgment may appear in the software itself,
26 * if and wherever such third-party acknowledgments normally appear.
27 *
28 * 4. The names "Apache" and "Apache Software Foundation" and
29 * "Apache Turbine" must not be used to endorse or promote products
30 * derived from this software without prior written permission. For
31 * written permission, please contact apache@apache.org.
32 *
33 * 5. Products derived from this software may not be called "Apache",
34 * "Apache Turbine", nor may "Apache" appear in their name, without
35 * prior written permission of the Apache Software Foundation.
36 *
37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 * SUCH DAMAGE.
49 * ====================================================================
50 *
51 * This software consists of voluntary contributions made by many
52 * individuals on behalf of the Apache Software Foundation. For more
53 * information on the Apache Software Foundation, please see
54 * <http://www.apache.org/>.
55 */
56
57 import org.apache.turbine.services.pull.ApplicationTool;
58 import java.lang.reflect.Method;
59
60 /***
61 * Utility class to allow the easy inclusion of
62 * images in templates: <img src="$content.getURI("image.jpg")">
63 *
64 * @author <a href="mailto:criley@ekmail.com">Cameron Riley</a>
65 * @author <a href="mailto:jvanzyl@periapt.com">Jason van Zyl</a>
66 * @author <a href="mailto:jon@latchkey.com">Jon S. Stevens</a>
67 * @version $Id: ContentURI.java,v 1.1.1.1 2001/08/16 05:09:38 jvanzyl Exp $
68 */
69 public class ContentURI
70 extends DynamicURI
71 implements ApplicationTool
72 {
73 /*** stores the context path for servlet 2.1+ compliant containers */
74 private String contextPath;
75
76 /***
77 * Constructor
78 *
79 * @param data a RunData instance
80 */
81 public ContentURI (RunData data)
82 {
83 super(data);
84 init(data);
85 }
86
87 /***
88 * Default constructor
89 */
90 public ContentURI ()
91 {
92 }
93
94 /***
95 * Initialize this object using the data given (ApplicationTool
96 * method).
97 *
98 * @param data assumed to be a RunData instance
99 */
100 public void init(Object data)
101 {
102 // we blithely cast to RunData as the runtime error thrown
103 // if data is null or another type is appropriate.
104 init((RunData)data);
105 }
106
107 /***
108 * Refresh method - does nothing
109 */
110 public void refresh()
111 {
112 // empty
113 }
114
115 /***
116 * Initialize this object using the given RunData object
117 *
118 * @param data a RunData instance
119 */
120 public void init(RunData data)
121 {
122 super.init(data);
123 try
124 {
125 Class runDataClass = RunData.class;
126 Method meth = runDataClass.getDeclaredMethod("getContextPath", null);
127 contextPath = (String)meth.invoke(data, null);
128 }
129 catch (Exception e)
130 {
131 /*
132 * Ignore a NoSuchMethodException because it means we are
133 * using Servlet API 2.0. Make sure scriptName is not
134 * null.
135 */
136 contextPath = "";
137 }
138 }
139
140 /***
141 * Returns a URI pointing to the given content (where content is a
142 * path relative to the webapp root.
143 *
144 * @param pathToContent a path relative to the webapp root
145 */
146 public String getURI(String pathToContent)
147 {
148 StringBuffer sb = new StringBuffer();
149 sb.append (getServerScheme()); //http
150 sb.append ("://");
151 sb.append (getServerName()); //www.foo.com
152 sb.append (":");
153 sb.append (getServerPort()); //port webserver running on (8080 for TDK)
154 //the context for tomcat adds a / so no need to add another
155 sb.append (contextPath); //the tomcat context
156 sb.append ("/");
157 sb.append (pathToContent);
158 return (sb.toString());
159 }
160 }
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